001/*
002 * Trident - A Multithreaded Server Alternative
003 * Copyright 2014 The TridentSDK Team
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *    http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package net.tridentsdk.util;
018
019import javax.annotation.concurrent.ThreadSafe;
020
021/**
022 * Holds a value to cheat inner class finalization requirements
023 *
024 * @author The TridentSDK Team
025 */
026@ThreadSafe
027public final class Value<T> {
028    private volatile T value;
029
030    private Value(T t) {
031        this.value = t;
032    }
033
034    /**
035     * Creates a new value which has the initial state set to the provided object
036     *
037     * @param t   the value to hold
038     * @param <T> the value type
039     * @return the new value holder
040     */
041    public static <T> Value<T> of(T t) {
042        return new Value<>(t);
043    }
044
045    /**
046     * Creates a new null value
047     *
048     * @param <T> the value type
049     * @return the null value
050     */
051    public static <T> Value<T> none() {
052        return new Value<>(null);
053    }
054
055    /**
056     * Sets the value
057     *
058     * @param t the value
059     * @return the set value
060     */
061    public T set(T t) {
062        this.value = t;
063        return t;
064    }
065
066    /**
067     * Gets the value
068     *
069     * @return the value
070     */
071    public T get() {
072        return this.value;
073    }
074}